Olson Technology OTD-3000 - Manual (Page 5)

025-000053 REV G Page 5
D) After an input channel has been selected, connect an antenna or cable source to the “VHF/UHF”
terminal. For optimum video quality, the input signal level should be -10dBmV to +25dBmV for off-
air and -10dBmV to +10dBmV for off-cable signals. Although the unit will function with input signals
as low as -20dBmV, levels below -20dBmV will be squelched in the output video amplifier by the
internal squelch circuit. Two baseband video output ports are provided - one of which can be utilized
for on-line application where a monitor feature is required. Baseband video will include composite
audio subcarrier if the “composite switch” on the rear panel is in the ON position. Baseband audio will
appear at the audio output screw terminals. A multiplex (MPX) output terminal is provided for broad-
cast stereo applications along with an i.f. (45.75) output port which allows the unit to be used as a
frequency agile input tuner for processor application. The OTD-3000 also provides a 4.5MHz audio
output port which can be utilized when using a modulator with 4.5MHz audio carrier input capabilities,
such as the Olson Model OTM-3000-CV.
E) The baseband video output is internally set for lV p-p video output (±10%) with a 75 ohm termination.
The baseband audio output is internally set for 500mV p-p at standard broadcast deviation. The
Audio Output termination can be as low as 600 ohms.
The MPX Output is 75 ohms and need not be terminated.
F) The Demodulator Delayed AGC Adjustment is factory set and provides the best signal-to-noise
ratio for low-level off-air signals and for adjacent channel rejection with cable operation.